<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no" />
	    <style>
			*{
				margin:0;
				padding:0;
			}
			html,body,.box{
				height:100%;
				width:100%;
			}
			.box{
				display: flex;
				flex-direction: column;
			}
			.header{
				height: 50px;
				width:100%;
				background-color: #00BFFF;
			}
			.con{
				flex:1;
				overflow-y: auto;
			}
			h1{
				height:500px;
			}
			h2{
				height:800px;
			}
			.footer{
				height: 50px;
				width:100%;
				background-color: #D43F3A;
			}
		</style>
	</head>
	<body>
		<div class="box">
			<div class="header">
				<a href="">返回</a>
				<span>首页</span>
				<a href="">+</a>
			</div>
			<div class="con">
				<h1>11111</h1>
				<h2>2222</h2>
			</div>
			<div class="footer"></div>
		</div>
	</body>
</html>
